Stained acrylic tub, looking for cheap fix

[Khaled Majouji]

Hey guys!

I need your help and experience once again! Most probably very easy for seasoned landlords but a headache for me. The bathtub in my rental unit is stained from some smart *** burning documents in it, so I have these brown/yellowish burn stains, does anyone know how I can go about fixing this without changing the tub or installing some kind of liner? It's an acrylic tub and the stains are spread over an area 8 inches by 8 inches and the rest of the tub is perfect. Any help would be appreciated!

Khaled